Journal
INTERNATIONAL JOURNAL OF PLASTICITY
Volume 101, Issue -, Pages 74-105Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijplas.2017.10.010
Keywords
Thermo-viscoplasticity; Zinc die-casting alloy; Stress algorithm; Thermomechanical experiments
Funding
- German Research Foundation DFG [DFG HA2024-18/1]
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Many industrially manufactured parts consist of a zinc die-cast material. Since classical constitutive models cannot predict the thereto-mechanical structural behavior of such a material - which exhibits highly non-linear rate-dependent effects, distinct aging properties as well a size dependence of thin-walled parts -, it is necessary to carry out mechanical experiments under varying conditions as a basis for constitutive modeling. In this article, one major goal is the investigation of the rate-dependence at different temperatures of a zinc die-casting alloy. On the basis of several experiments on thin-walled, cylindrical tubes of Zamak 5, a thermo-mechanically consistent thermo-viscoplasticity model without a yield surface is proposed. Moreover, a concept of material parameter identification is provided and the implementation of the model into a finite element program is shown. Finally, the applicability of the model is proven by comparing an experiment of a complex component part with finite element simulations.
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